Prepare the pepper. Preheat the oven to 180 degrees and put the sweet pepper in it on a baking sheet greased with vegetable oil. After 15 minutes, take the pepper out and cool it, peel it. Remove the seeds and partitions. Cut the pulp into cubes.
Make the seasoning. Mix salt, garlic and herbs in a bowl. Add olive oil. Let sit for 10 minutes.
Grind the ingredients. Place all the gazpacho ingredients in a deep bowl: pureed tomatoes, chopped cucumbers, sweet peppers, olive oil seasoning and marinated onions. Use a blender to mix everything into a smooth puree.
Prepare the soup. Pour the finished puree into a saucepan and add a glass of cold boiled water. Stir and leave to cool in the refrigerator for 1 hour.